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SUMMARY:Simon Stellmer (Bonn) - Ring lasers for rotation sensing in the ge
 osciences
DTSTART:20260522T134500Z
DTEND:20260522T151500Z
DTSTAMP:20260609T025600Z
UID:indico-event-17696@indico.global
DESCRIPTION:Ring laser gyroscopes are highly sensitive inertial optical in
 terferometers\, exploiting the Sagnac effect on two counter-propagating l
 aser beams in a ring cavity. Meter-sized and highly stable interferometer
 s have been developed in the past 30 years and reach a resolution of 0.3 
 prad/s after a few hours of integration time. The rotation of Earth\, inc
 luding its variations\, is a commonly available signal used to benchmark 
 the performance of large ring lasers\, which succeed to quantify variatio
 ns in the length-of-day (LoD) and to resolve the precession and nutation 
 of Earth's axis. Similarily\, ring laser gyroscopes can also be employed
  in the field of seismology to reconstruct rotational motions in seismic 
 wavefields. Building on the technology of optical clocks and gravitationa
 l wave detection\, new developments are underway to realize so-called pas
 sive ring laser gyroscopes. This approach relies on an external laser ref
 erenced to the counterpropagating modes of a ring resonator and might all
 ow for miniaturization of sensors with large bandwidth. In my presentati
 on\, I will trace the development of ring interferometers over the past 1
 00 years\, and I will highlight future developments specifically in the r
 ecently established DFG research unit RING.\n\nhttps://indico.global/event
 /17696/
URL:https://indico.global/event/17696/
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